<template>
<div class="auth-page">
    <div class="container page">
        <div class="row">

            <div class="col-md-6 offset-md-3 col-xs-12">
                <h1 class="text-xs-center">{{isLogin ? 'Sign in' : 'Sign up'}}</h1>
                <p class="text-xs-center">
                    <!-- <a href="">Have an account?</a> -->
                    <nuxt-link v-if="isLogin" to="/register">Need an account?</nuxt-link>
                    <nuxt-link v-else to="/login">Have an account?</nuxt-link>
                </p>

                <ul class="error-messages">
                    <template v-for="(messages, field) in errors">
                        <li v-for="(message, index) in messages" :key="index">{{ field }} {{ message }}</li>
                    </template>
                </ul>

                <form @submit.prevent="onSubmit">
                    <fieldset class="form-group" v-if="!isLogin">
                        <input class="form-control form-control-lg" type="text" placeholder="Your Name" v-model="user.username" required>
                    </fieldset>
                    <fieldset class="form-group">
                        <input class="form-control form-control-lg" type="email" placeholder="Email" v-model="user.email" required>
                    </fieldset>
                    <fieldset class="form-group">
                        <input class="form-control form-control-lg" type="password" placeholder="Password" v-model="user.password" required>
                    </fieldset>
                    <button class="btn btn-lg btn-primary pull-xs-right">
                        {{isLogin ? 'Sign in' : 'Sign up'}}
                    </button>
                </form>
            </div>

        </div>
    </div>
</div>
</template>


<script>
import { login, register } from '@/api/user'

// 仅在客户端加载js-cookie
const Cookie = process.client ? require('js-cookie') : undefined

export default {
	name: 'login',
    // 在匹配组件渲染前会先执行中间件处理
    middleware: 'notAuthenticated',
	computed: {
		isLogin() {
			return this.$route.name === 'login'
		}
	},
	data() {
		return {
			user: {
                username: '',
				email: '',
				password: ''
            },
            errors: {} // 错误信息
		}
    },
    methods: {
        async onSubmit() {
            try{
                // 提交表单登录
                const { data } = this.isLogin 
                    ?   await login({
                            user: this.user
                        })
                    :   await register({
                            user: this.user
                        })

                this.$store.commit('setUser', data.user)
                
                // 防止刷新页面，数据需要持久化
                Cookie.set('user', data.user)

                this.$router.push('/')
            } catch (err) {
                console.dir(err)
                this.errors = err.response.data.errors
            }
        }
    }
}
</script>
